Professional exterminators have specific training on how to eliminate different types of pests, including mice, ants, termites and more. When an exterminator comes to your home for the first time, he or she will do a thorough inspection of your property to determine how the pests are getting inside your home. Next, traps will be set with a chemcial that attracts the particular type of pest that you have. The exterminator will then remove the traps and the pests that are in them. He or she should also do an inspection of your yard and garage to check for any nests or infestations.